Sleep mode lasts just a few seconds, my fix

I had the problem where vista would go to sleep, wait a few seconds and then
start up again. I have been looking in this forum for a month or so but only
found others that had the same problem, no solutions. Well, I think I found
one.
I have a new PC (motherboard, graphics card, disk, DVD) but I kept an older
USB keyboard and mouse. My fix is to go Control Panel/Mouse
Properties<Hardware Tab> and press the Properties button. Then press the
"Change Settings" button. Under "Power Management", turn off "Allow this
device to wake the computer".
I did the same for the Keyboard.
This means I need to press the power button on the computer to bring it out
of sleep but it seems to work great.